Guru Nanak Dev's birthday is known to Sikhs as Guru Nanak Dev's prakash, or the dawn of spiritual light. Guru Nanak is the founder of Sikhism. Guru Nanak Dev's birthday, or prakash, celebration is known as gurpurab, a commemorative event, and is observed with a Sikh worship service which includes kirtan, the singing of divine hymns. When is Guru Nanak Dev's birthday prakash 2011?

Ancient records indicate Guru Nanak Dev's birth as the 3rd day of the waxing moon, or Sudi 3, month of Vaisakh, Vikram Samvat (SV) year 1526, or March 14, 1469 of the Julian calendar.

When converted to the modern Gregorian calendar, Guru Nanak Dev's birth or prakash occurred April 14, 1469 A.D. Therefore, according to the Nanakshahi Sikhism calendar, Guru Nanak Dev's gurpurab is calculated to be observed on *April 14, 2011. However legends that Guru Nanak's birth happened October 20, 1469, on pooranmashi (full moon) result in traditional gurpurab celebrations held late fall, calculated to be **November 10, in 2011. Guru Nanak Jayanti Date 2011